Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '610b92cfc0c8705cbdc0fc670a51a821c9814d49ac58a8b5f0cc8b381ed71ba2' 
  AND token = 'm/JvVLHbkCcHdVX9xJlgmDVAUwA6qibPmF+z8+wU6yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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