Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dac65a021d4fee5c01441d55a15c8f0c56c8136c42af8bbc07b3c0f51cc788f6' 
  AND token = 'qKJRJI5uuQ7Ipn16D4Kq/4oHSPhmmbs3cxZm5w+u1UE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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