Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1779f0567f272a3dc9f5cefca9777658f639358166362e51039294d1d4cda889' 
  AND token = 'yIlnHMsuPjh0uYb3X2Bl5P/3LfJIAF5JpYtX1g0j7aU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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