SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a1d9342c4f2f427a659882a43a8852a7f51929dae0c9e15ca69f7f5fa2cc1886' 
  AND token = 'iZjthD27urgILs+jQkzuNGnt2pW00iqxK5FK32IBgXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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