SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61c389339249bc1444fe3d7c739237e72ca3ba660479894958dfad514173f107' 
  AND token = 'FXZUp/6aQsWGK9inV8ciZOajBMbrs2YpgG+XV4/dRV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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