Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '483860668c554641f64d2b7e43d51a23f53acf2cf872b37cc0325972df2b106c' 
  AND token = 'b9LiltMLOOjB6R6voaF1poG//Q6ROwBIPdWDkai3iQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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