Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25a07eac2a8d60d207b7e0b7c16a3758f1afc9141ed1e9e66f0e809e8adfe82f' 
  AND token = 'Og7NivMQylQwsM/aCWh+RNHenyXN2X1a1/RlCMkUItM=' 
  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"
    }
  }
}