Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '90616e9116dcc886912b915ed1d113e3e6954a58031b83bc3e5150c17afa227a' 
  AND token = 'bTgxmZuuvod5oOKN3I0Lv7sZsLPOaGmWChDGXAPajCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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