Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dea990f6d37e4442770d13e6d123cae5085324a06426f0947363b060dc97a721' 
  AND token = 'J6nSd9R9EHvKvR383sdC75et8xx2I1/8vL8Xs09hWS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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