Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98d9e512fd79ec913e11159e2611752e8fdcb9686f90d660863023f06111041c' 
  AND token = 'QNFEOK+V6phRddAX3t4ft1WKo1UkIgxfJ6ym+sRGhAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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