Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '782c63a9977f2babe4abb0ae1de1a7551613043f2ac68113a61b4f670472aade' 
  AND token = '5EJVeeDEXnzG1wW/SY6r5iscxP8ZKT5c3/vM7N3i5iQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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