Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b8c6e69ef482d05f8215afa46cdea4fa14631a02fef3ae297c4509c2ababd81' 
  AND token = 'VfBtb8sg45pjk/sACmL+v9CL7a5OcjgAuTKEkCHDPes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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