Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f49550a40ce14ec3825d091e9025fa085742c4505932df8eca77a898b0447bb' 
  AND token = 'SSG4UWOUBlc65oKcgTMb2E+Z+bMBZA/ivQrbHJzQimw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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