Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa95d2b4a81d1462026645fca50d88d167e9d8733e6fe0b622a11dd395f02e7f' 
  AND token = 'O3d/pkrQIt8sJRsXoTRIs3coQFvLu3zabKgtKuXBV5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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