Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c452e0f7863b4cdbc631a200d8cc57be4f9feb674b835b9a21b25c19aa033ef0' 
  AND token = 'nEktLuX9PkyCMtiBwyqW6/2/oeUoAZMLRjTrL35iQBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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