Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c493bb95db52d242f3a0534d1713a70383f3f32579d76c468340272182583a2f' 
  AND token = 'LIsM9+R6L3i7fSFgMS8eu07s1/LOiuCv993+gmyiO3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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