Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '301f7fb31d144dedb7a11091f5b48685dcac1c288efa424622fc97ddedcea7d6' 
  AND token = 'nDn8orhDXTB1tdYHb4PVgpPSQLGvOXslCv8PFm3VAVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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