Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c28ade5ef889241f5427f7c89cb83b6655873e3ef82492f720ba1942ab609d9' 
  AND token = 'aXr55bKx/+Q9MO59htxmzs666eGfdn2Opy5xKMoSI84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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