Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03e84f3aa55b354aeac1ab5471d02bb7a0f05345651e697cc10588643744c01b' 
  AND token = 'uqnnEGkZpj4JmT6LGzSEkKMWm64CBq/4aQt9+QeB4AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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