Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ce4b5d280f33b2c7b7ce2da88b043bbc334e0848f31350c9cae3fdf74411f63' 
  AND token = 'pkfiKfSNCRXVw3/Ckm9u7BeWNEwD/itnshQfhmFDMck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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