Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '239f916aa1ef6bfa85cc05faf7be827e2e9eba05b13c3171aff0ba023d9b0855' 
  AND token = 'Rqn/06t+UKRRZaD5CpWjZ3P0Q/+Uyy1Kr/i3OTIC0vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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