Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4261a9fd7f8b93bdc14e4d4ffd3b098d640465cdafb0606d40b2834b60dac900' 
  AND token = 'maQk4ziHXKYc9zPiZJ99PorRaTGkRkkEidg8rLZkaVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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