Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9303e6c4cfdf6b6a2a324d8d937c4a079fb2e8c3bc6bf364092097f87f9c9280' 
  AND token = 'OcFisoPk+z2jmxseEK25Lh49GuErbS333uFEDXo4pkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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