Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eb930369c678e6c29fd0010cbff2972ae97dd4121ac03068b8d87960e20a1b6' 
  AND token = 'NS1g4qTa+mOWCMwivhfxrHroJg9UPcXSWy+70I2DptQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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