SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80dde4fefa1e30d5288922f76373de422dc7e80d1bbb294f9cc3487000a311d9' 
  AND token = 'Yt4jASVofs+vvsKM3B1mhJNz93RyV4Ue9BKGR3DzQ2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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