Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96ba96bf8d42741c90eed40a4c24572d98029fcf637d61df5ece4d09628c7fa3' 
  AND token = 'MuLTewaGzQ9lluwKyy6ey/3DJabjcMaqh6ROWtpkyO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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