Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ed4ddc2285ab537ef306b9d444699532220b852c555e62184cd87ad01947244' 
  AND token = '+51TSZHeipfvWeOdFwpfenv9ccvH5/dNqg6qKnV3qBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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