Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a5c71352fc8a21a54d77c2c79657a611c4788ad2ccb03284ed47a0573ed2248' 
  AND token = 'STWQX++/nDOHdYdJNFndgoyKqp0eV3pZ6YoDnaoA+7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}