Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4388615474553f9d5666ae6b2a0350a9b1efa1e5934c07b9a9d15055f8a0f5d8' 
  AND token = 'ixt1PLVRPvnhMfRu5Obcde5yIgpDihcenkS5F2EPBBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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