Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c27a516269a3fc7159738f57a388f96139a9b7f9ca3fc8d490afef60cfe58337' 
  AND token = 'DLBsfD1dx2z2uE+z2bPw7GwwBAfx7MBkn/l5FiJuvhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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