SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2273b596d733b6effc90da09c008dacc62c215a734912f931353a4bc01691417' 
  AND token = 'aMK0wncKdBZsJ1SwzakKiuCLP5YL4AW/KFzlz8Ycryc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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