Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c12d8d4fd9d066db734e71d4f6a7ecca140cb525330ca7ea989216585e55dd19' 
  AND token = 'X4a+9wutAUQ2fptm/cx8ltiuVRr/8NoCNisy7G2eO2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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