Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afebd2941ff76e7e1033b2c132e2e1740f9f21beaa8d0d5fc09a23b07af4bdd4' 
  AND token = 'pQB0VAE2jlG/LlNC1dRIFNE3ZHF0HeV9xyzdPWPvaQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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