Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bc7ae9fae4717c26cfca50fcd6c64d35e3b90cb48cb225f8b7a3e12479b3ef8' 
  AND token = 'AYrfORyqg34zGEIW2cPXsu0OEJKSYSQCpYTdvoHSlVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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