Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f3da85b5dd64c055e2676a5444d59c726a74a63c239646b099ca1e53298544e' 
  AND token = 'fb54vmvIGtU/ZLVjS9yn5XI7mvB+BCBry5eyp5i7XvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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