Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c37487a633937f876b52675e9054e0bc7a7af445161f1d813d70e6ce4ae53188' 
  AND token = 'XLzQu3Oizc8+jrRG9mqsmjso87FLNXH/Wk5iFbsn3iQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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