Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7392ef5114bd25f541e14d86c8acf452375753da24af58ec08c7392ee2ca0650' 
  AND token = 'PryJ3Tpli7cwTiwS6z6k3UQIsAKdxX0uDlQN/BCW6Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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