Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f30546e6261a51fc7c4b06e76778755230355ec12b73f6a0c467cb97b65ecbf4' 
  AND token = 'WZDDHvKq5hhVCbyOOGQUPEnb87OWC+oaa+w6B0X7qC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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