Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48928a03578cfc56525b782778f9b046c80452811deb6b29bb1210a0774ea9bb' 
  AND token = 'yHpwo98OithnKqyjwKIPDqKvixB764vNGEmdlcqA9wY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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