Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8f782a0dbe43575d2a829a9c21f78e129be82d57f989d8c36022bdf3b186b05' 
  AND token = 'W2ccWii2NxCimbVpTAwkZBiJjTTp+pBv4g4NkOdWQiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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