Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f3b008fd8ac346697986db03fc766415773a2606fa4a6f9734bc4e58f918cd1' 
  AND token = 'mX/fgSypmNRDRWKU4XTDnNrSZbyVAn0Ja7x2lnZqEFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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