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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b804ef97d1cfed25f4a759e5034ea68a407e65186bc00950cbe6a95e38d3acfb' 
  AND token = '9t9T3ha87VHGIEvizw3G4s6WLx0jYH3G1uxa4MCbW7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}