Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f40117345d70b8d45cb0482017ea31ee401a8b87f7b183cc25b2c5a387bc5860' 
  AND token = 'iRi7wvn88wyAFRgVBsX8byW+jXFC3ewo35KBujfHEao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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