Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4c743ed8eeb5911bbce58e4033d48d278931eacc84c5b75efe3e6f2790b4536' 
  AND token = '91Cqy9AFf0SikcMy2JHTYzQ0UjUyfFuxOPF0NrMrTzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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