Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd63cf44a9952448217e25a3da4f2d62db75bb503b66a3ddb55e961d494a412b1' 
  AND token = 'x3FbdzW8Iy6HLj2znF685UJoqrSfycK8m9nxI5YAs30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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