Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '091c9c6b033c7a4c1c8a6b7395c4d70cd172b903875a21fa62f77999b09c852f' 
  AND token = 'tzxbryJ8YLBYBBNl/AGIMERM6t7MVNFF+wKRNl9kUy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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