Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '890aaac1326e52ad631bbc0993b0b975fa253c22f2d4b56a28d2fbce67de0597' 
  AND token = 'EyU6tot33JsjQUfSiVjnW6kCootGxOERWI03I4Bfc+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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