Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff7aebbb5de0c66fe81c03c308bd4e3ff4c261eddc0fb584580be82429e1007e' 
  AND token = '6UEnRm1qImthsy5Xsw6ffd3xSMpk1wjZ8LddOXiteZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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