Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16ddaccb50323e002bad5749c5dfc4d99e4aaeb14845bae8cbe07efacf45541b' 
  AND token = 'vY7cqJKyfqmM0vsOexCudorcXBl7fX8dR9mJx07qhLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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