Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28cf4e9b7f9cf3a2215b942055fef4aa8b476640c8bd747f3b7f3eaafc0b13da' 
  AND token = 'UMYYV5r3dDLuChohLLeoeTtffuc4uOYcxqRNM3ypLMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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