Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e896eef257982e7ca59dc40604182e03f53b581b33bb81f487dea0139c91ac16' 
  AND token = '9XOxah+7JYEmZZZqr34/CTe4n2lVgEXRaObRIZxOwQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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