SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07f27b85805526fee0da60192e36b639633d0bc85f9bc686a533839689428137' 
  AND token = 'ptzQZMD3IrCNwZBzn+Wl49c/Kw3V5rOLZszgnJhH8ZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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