Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47ee374edd69f9460508c2566b12a5c7a864b5157c99d04833e0a428dc02372b' 
  AND token = '5D2GZb9iyEeZuleBDOMOADNcF7K3sDfOab49A3+Nm60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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