SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f564905f17ee50f6b35355c888b92313b1606e849a1081d744653c50657dd4e3' 
  AND token = 'HUFW7YCKo3JfphzdSuG+CBg7JhTvvR7da1++FDq+1LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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