Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '517ae2053753ce2b4ad59014f511232afb7526a67ab4bd35ba3660da7b152a87' 
  AND token = 'WCVTGiX5Md6IT5axEwD/xAtws3RioG0V7NdcZ9KnOsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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