Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc68212206e5182b120a8c9608edfdffbf890020d39a67f520a0cc0ce4e923ef' 
  AND token = 'W3vwPmiDCoibq9XyGmisLgKBK90sezdr/G/IKvmJ6XY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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