Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d367d57901ee0fb6a01c04ed7b3422d018773589dfde58f4ed8333e9a130a81' 
  AND token = 'c5o7d2HQ+XrmvSSsgkllf8i5JBSL6Jw+5yTsJXQ6HDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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