Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ef858d287b528f45ec60c433aefcf27006288c3b9979a36e605e9218cf2b013' 
  AND token = 'tUFVjk+LMbvtEU1U9Nzv/6xAdfDP5Y/TJiW6sAR3ffM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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