Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67443ca057e6fd1874cf43d6b3b6b9ebd115a99b443fb6ba7c2e00bba6dd0fcf' 
  AND token = 'y36Mf+Gv4GTwTOMUqhVllvocdgYnhJfe8Xvt1ZnD4HY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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