Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e064ebe1b28d3e8a17ddd7b11cb6101050a09166db4c861aa66cb25e1e8c63e0' 
  AND token = 'wtQQGV/LOt/Ag8KPlk29eqLrBsyfy9LreWVimcjWb28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}