Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '285560d6caec199fda24439d41abc451213e0fb0c113dab7223b41028bd0aa8b' 
  AND token = 'miMylZCCccrRb+BmdYG0mOXWAw/YFrjwZDHNjQW71Ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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