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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d107f7800bd8084a601526ebc58bfd23213185a699ef67a33165a3a47bcef6f' 
  AND token = 'ic3ui7zmtymgSScGfW7cZ8C6bTZ8ItrdTYOpfa3mxQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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