Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4382deee51b464f057a2369aab87d25296f4faa52869edec3d2fdc6eef174460' 
  AND token = 'jtr3f/A877W4Ddjf080t1jizojKb/o2DokxKjjuzUyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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