Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8e1d2e05b06e1a8e11e31b55d347459a1e66feea1490536da09aff40770ae4d' 
  AND token = 'LAkV4aP+NEl5bdJx7n2yaIgwC6MgijUkN9o2WQmnT4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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