Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5c4247a5e8d79f9bda321005b1ad327f2e1e54e8e2f1b497ce371a4f744915f' 
  AND token = 'MpR0xiopXJhfjeZGpixAMm5ZBss2KcQLKhCEE25nXbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}