Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7e424feb439866db8f5efa974136ddba7e7bce677229e4ff1e2be5b6968a31b' 
  AND token = '2Aq+TZoFKcMY7WevRcoBEO7Py/61BeyKKsXVustn8M8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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