Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e0ee39c4dbe48c1c87c2ffda1597ed2a5480c8ce97ca5307e308ee9e16e8a9c' 
  AND token = 'QKnf/LF/FcDmv9twJ0c5/dvsahyrPFurNQ61SIp7nEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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