Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b44eaa5b432b9d51e42582b33503cf0231527a8f9622b0a5b9d14a5c88af9bcd' 
  AND token = 'JsuzvqilbfMbLMjbCX4rg6aZOWHkjUnoGkBbTEXoPig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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