Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ced17be9862f8950e333ac6b0c8b2ca1bb61b90e164b68f30be8f927c02d58fd' 
  AND token = 'BnA5nVF0hGSdCH5YR9FBeW32WR7J635QKjcmWul2b8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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