Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c6926d9399ef8e33f7332a82eb53df0d6c719ab51cadbbb315f11c3b954dcc2' 
  AND token = 'ZI1xtCpCAEuIEK/EinZFZFfshNzPumrqGyjO66Vz2Zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}