Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ef5f24ab6f622be853d1aff2ae9bdb1dd4faf06ec8e0724df8019084d81a43e9' 
  AND token = '7R3zBt430XJB0/7CN1y2tKLDZIQlcDCLCy1FbyIoF7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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