Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9045ff7831594913f9489ad1e1fc60609cc847eb1dd9ddde1127c2c466d18f1' 
  AND token = '63qwC+UyabOl5xkpKz2cJUDfgG96eMG3lBQGkzYsDIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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