SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b573d0763b4975abeb15e2cc4ffd65c199f8d3d6ac3022f8eda876a753e22f4' 
  AND token = 'brhX60sPviTdH4DLETJpRjXPKWYCP/uDSDoQinMLdGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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