Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6fd85a6c4e1ff2a1598de8f67178f947ef908a55be893afd26072ddcd427fcd' 
  AND token = 'mnOSstu+9KGlXJoQj17Vi1LINzaxP8O3ZQkB8Iut54U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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