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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d845e60edc4394e57128903ef7d2a384c7e355c47b9c518053aefefd180b14b' 
  AND token = 'G/H34zxlvJK9e8r7Z9E2+9YDJwA1c0Et5g8umGE9tCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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