Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98ef42740702a217788cc12d7da022c541539e9d761cbf1d501f9748770a82fa' 
  AND token = 'dLgaJhamdEPz7Kt7L03vIqgvAWHmgvVxrW0TkRdKuKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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