SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1616463d1a16131a9955e2eface0063be3364e750f4553fb68b4439382ee1b9' 
  AND token = 'AVLkZsKTU5LEdmPLjqg5jBNOoqg+tSPYtljlYQz9Q3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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