Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '185e8e7d1add712d5a66cf80b90c98ea41bfad92eb3eb72aa7828cd6f7d421ba' 
  AND token = 'fA/xzQfRyDqEaJYHjJ1YP944zXO1pFI+/yYaAsZ66uY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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