Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2789db886199f1c94ad217bf227bbb5f77fa976243f9a14242c607f5bec6d37d' 
  AND token = 'mCLpVxORLHSXf2CVGevVN37oTqyoRFhLrrLZeEuypOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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