SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '269edeb153b049f8048abc2ac42c5be571ef100aee6682d4bcd03a8ecac74049' 
  AND token = 'ZBJIvFmVmHWWukGnJInQEUU37ZmW2DbX/gQPf9itYGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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