Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e676d11a8edc6a9a95782c62670987bdd9707a07599306c19b561722b08b54b2' 
  AND token = 'FfUDLOzjNO3PzW0GSlAVavRHaO5pFwTvZHGVDMggwis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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