Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c79bfdf3080d19bfd500bf7c3a48e7932538914d0c9cda1c56e66a68d1eb1857' 
  AND token = 'NCHAETAE1hjGZ8XpfcIAL4nk0NRsoz8DlVWxaCmOJZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}