Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '023fc049ff7a7d5423f611602092b0f62b298763d9fb31d9cc133b572ca50e99' 
  AND token = '0BLmoxlTiuDsj1vyeWhayK0V1z1Z1zRcTlZN7XYr+3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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