Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '404ca99324f3d436759c6a6d52cc265ef3376812919b44dafe53a54664b50382' 
  AND token = 'EVC+dsD+ju25yQDUjG2eHdi6sczZZYSw1HG1mWkLlQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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