Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b01c75d031c2e6d07f98748d251ec565c802f294bf4c8910159352c9603be2b4' 
  AND token = 'supz810iOnqE/JM3mnbKqBd2kMQj8kUR5C1edyeIja8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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