Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ec449c27b3cf9b79199ce90601bd9b1305efbd9dd517a9140af018d399d7c3' 
  AND token = '9ImjA23COllMMelwwVK7VnPO/jbiVpNyC1LdUb/2DW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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