Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd622ee873fe30430050f2e7767e41c945bb1efd537743819411e6c35b373746f' 
  AND token = '+LZHmpXGPmEJTlVNO834FNuR+WlU0mfqe+q9V+NW16U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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