Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '452380189371d31bd2ad83dcf8e653e3baaf5dd6098b36eb9f22ecdeb23aa35c' 
  AND token = '8CsckYeFbtwIQI4HDtkmlxukyQN1OIup0wNwB1fAXvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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