Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c6c0872bd3a16400298ce7d8f3847e1c6988e5cd4ced7a6d65489419694ebe8' 
  AND token = 'ufhNSVcI8pphgp/f9I+/IuIiudijXIQUf9ySdaVVIMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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