Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81b7663f51467f46560099a461bc96f2609c4937786b54eb65d209882f5b3985' 
  AND token = 'EIXWWK06AxuNgk17RYL+dFFA2uvRjGlCQUUXC7qf2rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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