Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f661cb7455a4ada6b2fd69da48276163266e734732e84e0b7e026dc57647af7c' 
  AND token = 'hyZTCszdVd5aNggizqFz5xjcLNgArODehSHuPNghQdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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