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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f71fbae1221442adf06a60176e1b25da7ad9b1977bac1131e450a161b94e7068' 
  AND token = 'LYKDxhvC1wpdqvli22Eal7SluEHLabrX9kc5x/t4sB0=' 
  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"
    }
  }
}