Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac7670692d8cbd3629d0e8c94eb96b58bf804189b48ffab5ddefadd61e55c3ee' 
  AND token = '3ohUGxgYTQbPBvaQEUrzLgeb53hh6ACyTIadWD5TRrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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