Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8edd380bfd545c1b291ec328d7f85c176a65357cec3a61935c123b690058615' 
  AND token = 'NA+lwbSg0zfIpIopbdz3wGIuTGYxWouxFjq9olI4STo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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