Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2532c2e950f9f7707da72abec6a41d70375842c19300266797d10150699da862' 
  AND token = 'swYUIH1zxdHdOWHiKmy9EL1sNSow5FJdDfO1OPExKdk=' 
  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"
    }
  }
}