Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3c32e0b7816b420df3edd90abf836421d7c8a082ae4174563312fcbd039151bf' 
  AND token = 'VAoFwoJQcpqfyIQc3e8j04MP8JuLeESaZPDx2+uViiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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